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Author Topic: 09g gearbox reflash  (Read 1546 times)
k0mpresd
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« on: March 18, 2018, 10:00:44 AM »

 Smiley

https://youtu.be/FMh2adOHA0c
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mister t
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« Reply #1 on: March 18, 2018, 07:47:33 PM »

Cool man  Grin

Question though, is there any danger of blowing the fluid pump?

I know that was the reason for the 6800 RPM limit for the 6 speed ZF 6HP transmissions.
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IamwhoIam
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« Reply #2 on: March 20, 2018, 07:39:34 AM »

Cool man  Grin

Question though, is there any danger of blowing the fluid pump?

I know that was the reason for the 6800 RPM limit for the 6 speed ZF 6HP transmissions.

Lolwut? what 6800 limit?
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mister t
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« Reply #3 on: March 21, 2018, 02:21:02 AM »

Lolwut? what 6800 limit?

That's what ZF's own literature claims is the RPM limit for the front fluid pump on the 6HP-19 series. While the pump may be able to spin higher, from what I know, it's in danger of failing above 6800 RPM input speed.

Further, I know from experience on my Cabrio with that transmisson, the TCU will override any ECU request for a higher RPM limit. I have a million and one logs, where the Rev limiter kicks in at 6800 RPM.

In fact, the trans will normally shift up at 6500 RPM. 6800 can only be achieved in 'sport' mode under kickdown. Redline in tip mode (even w the shifter in 's' will be 6500).

If you know of a way to increase the rev limit on a 1st gen 6HP-19 equipped vehicle without having to reflash the TCU (which needs to be done on the bench) please let me know.

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Praga
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« Reply #4 on: March 21, 2018, 03:50:13 AM »


Well done
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IamwhoIam
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« Reply #5 on: March 21, 2018, 04:07:52 AM »

That's what ZF's own literature claims is the RPM limit for the front fluid pump on the 6HP-19 series. While the pump may be able to spin higher, from what I know, it's in danger of failing above 6800 RPM input speed.

Further, I know from experience on my Cabrio with that transmisson, the TCU will override any ECU request for a higher RPM limit. I have a million and one logs, where the Rev limiter kicks in at 6800 RPM.

In fact, the trans will normally shift up at 6500 RPM. 6800 can only be achieved in 'sport' mode under kickdown. Redline in tip mode (even w the shifter in 's' will be 6500).

If you know of a way to increase the rev limit on a 1st gen 6HP-19 equipped vehicle without having to reflash the TCU (which needs to be done on the bench) please let me know.



The TCU NEEDS to be reflashed, there's plenty of V10 RS6s and C6 A6 3.0T I've done on ZF 6HP that run 7200-7400 RPM and they don't have any pump problems.
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mister t
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« Reply #6 on: March 21, 2018, 09:56:39 PM »

The TCU NEEDS to be reflashed, there's plenty of V10 RS6s and C6 A6 3.0T I've done on ZF 6HP that run 7200-7400 RPM and they don't have any pump problems.

None of those cars use a first gen 6HP-XX much less a 6HP-19.

It's entirely possible that ZF strengthened the pump assembly on the 2nd gen 6HP's, especially on the higher torque rated models.

Like I said, it's what ZF said. Whether or not they were being overcautious I don't know. However, I can see why they would be conservative in their max pump speed ratings on a 1st gen transmission. Given the cost of replacement, it would be a financial and PR nightmare if those transmissions started blowing up at stock RPM\s .
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k0mpresd
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« Reply #7 on: March 21, 2018, 11:01:41 PM »

to be fair, i have read documentation specifically about the -19 gearbox and it does not back up your statements.

there was no universal max limiter. the stated max limiter was a combination of torque input and the engaged gear.
« Last Edit: March 21, 2018, 11:05:48 PM by k0mpresd » Logged
IamwhoIam
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« Reply #8 on: March 22, 2018, 12:09:40 PM »

None of those cars use a first gen 6HP-XX much less a 6HP-19.
blah-blah

ok shoot an example of one of those boxes, as well as a proper software part number please. If you mean B6 S4, then I'll agree it's a different type of 6HP than later ones.
« Last Edit: March 22, 2018, 12:14:13 PM by IamwhoIam » Logged

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prj
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« Reply #9 on: March 22, 2018, 04:04:40 PM »

None of those cars use a first gen 6HP-XX much less a 6HP-19.

And here is the point where you are wrong. C6 3.0 TFSI -> 6HP19.

Also, even early 2003 6HP19 on VAG is OBD flashable BTDT. No issues on those above 6800 rpm either.
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mister t
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« Reply #10 on: March 22, 2018, 10:54:19 PM »

And here is the point where you are wrong. C6 3.0 TFSI -> 6HP19.

Also, even early 2003 6HP19 on VAG is OBD flashable BTDT. No issues on those above 6800 rpm either.

Well I'll be very happy to be proven incorrect with respect to being able to flash a 1st gen (non-canbus) 6HP-19 via OBD.

You're literally the only person who's told me that it's possible.

You wouldn't happen to have a binary read for one kicking around that you could post up?

I'd like to see if I could make a few tweaks to my 6HP on my early 2005 cabrio.
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prj
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« Reply #11 on: March 23, 2018, 01:07:48 AM »

You can read the whole cal over K-Line. And you can write only cal section.
Not to mention SGO-s being available for things like 2003 phaetons, which are K-line.

Easiest way to flash is if you have sgo and know checksum algorithm is to decode sgo, make modifications, sum, repack sgo and flash using factory tool.

So make your own tool or make your own sgo packer/unpacker. The xor key is MILKYWAY.
« Last Edit: March 23, 2018, 01:11:23 AM by prj » Logged
k0mpresd
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« Reply #12 on: March 23, 2018, 09:05:10 AM »

You can read the whole cal over K-Line. And you can write only cal section.
Not to mention SGO-s being available for things like 2003 phaetons, which are K-line.

Easiest way to flash is if you have sgo and know checksum algorithm is to decode sgo, make modifications, sum, repack sgo and flash using factory tool.

So make your own tool or make your own sgo packer/unpacker. The xor key is MILKYWAY.

this is exactly how i flashed the 09g. unpack > bin > modify/chksum > repackage sgo > reflash.
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fastboatster
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« Reply #13 on: May 11, 2019, 12:02:14 AM »

very nice. i'd like to do it to 09 2.5 jetta's 09g just for shits and giggles
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